CN204794071U - Digital arc extinction cabinet - Google Patents
Digital arc extinction cabinet Download PDFInfo
- Publication number
- CN204794071U CN204794071U CN201520389337.6U CN201520389337U CN204794071U CN 204794071 U CN204794071 U CN 204794071U CN 201520389337 U CN201520389337 U CN 201520389337U CN 204794071 U CN204794071 U CN 204794071U
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- China
- Prior art keywords
- arc
- arc extinction
- digital
- extinction cabinet
- controller
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Abstract
The utility model provides a digital arc extinction cabinet, include: the casing sets up at the inside arc extinction controller of casing, detection device and control protection device, detection device is including setting up at voltage transformer and current transformer, the control protection device is including door electromagnetic lock, switch electromagnetic lock, isolation switch, the disconnected high -tension fuse of high score, overvoltage protection device, high -pressure current -limiting fuses and vacuum contactor, the arc extinction controller is connected to voltage transformer and current transformer's output, the output connection control protection device of arc extinction controller, set up the RS495 interface on the arc extinction controller, arc extinction control sets up harmonic elimination and secondary computer harmonic elimination device. The utility model discloses the digital arc extinction cabinet speed of action is fast, can extinguish electric arc immediately to can effectively limit the arc light grounding surge.
Description
Technical field
The utility model relates to overvoltage crowbar protection field, is specifically related to a kind of digital arc extinction cabinet.
Background technology
Mostly adopt the operational mode of isolated neutral in the distribution system of 3 ~ 35kV, when there is earth fault, allow to continue operation two hours, as through the approval of higher level relevant department, can also extend.But code clearly defines for the concept of " single phase ground fault ", if single phase ground fault is metallic earthing, faulted phase voltage reduces to zero, the voltage to earth of all the other two-phases will be increased to line voltage U L, thus the electric equipment of this kind of electrical network is as the insulation against ground level of transformer, voltage/current instrument transformer, circuit breaker and cable etc., can meet and bear the effect of line voltage for a long time and the requirement do not damaged.But, if single phase ground fault is arc grounding, the earth current of general 3 ~ 10KV electrical network is more than 30A, the earth current of 35KV electrical network is more than 10A, electric arc is just difficult to extinguish, cause the transient change of operation of power networks state, cause electromagnetic energy saturated, produce ferro resonance, and cause and perfect phase voltage and raise, its overvoltage is generally the phase voltage of 3.15 ~ 3.5 times, Here it is arc overvoltage and ferro-resonance over-voltage, this makes a big impact to the safe operation of electric power system and the reliability of power supply, very harmful.
Summary of the invention
The utility model, for above-mentioned prior art Problems existing, proposes a kind of digital arc extinction cabinet.
The technical scheme that the utility model provides is: a kind of digital arc extinction cabinet, comprise: housing, be arranged on the arc-suppressing controller of enclosure interior, checkout gear and control protective unit, described checkout gear comprises and is arranged on voltage transformer summation current transformer, described control protective unit comprises an electromagnetic lock, disconnecting link electromagnetic lock, isolation switch, high breaking high-tension fuse, overvoltage protection device, high-voltage and current-limitation fuse and vacuum contactor, the output of described voltage transformer summation current transformer connects arc-suppressing controller, the output connection control protective device of described arc-suppressing controller, described arc-suppressing controller is arranged RS495 interface, described extinguishing arc controls to arrange a harmonic elimination and secondary microcomputer harmonic elimination device.
Further, described housing also comprises impact protector mechanism.
Further, described housing arranges observation window.
Further, described hull outside arranges display unit, and the output of described arc-suppressing controller is connected with described display unit by display driver circuit.
Further, described display unit comprises on off state display control device, comprises charged display, and opening and closing state indicates, and earthed switch indicates, and energy storage indicates, and handcart position instruction, voice anti-fault prompting, humiture numerical value shows.
The beneficial effects of the utility model are: digital arc extinction cabinet quick action, and rapidity can action in 30ms, greatly shorten the duration of single-phase earthing electric arc, can extinguish arcs immediately after digital arc extinction cabinet action, and effectively can limit arc grounding over-voltage.Allow capacitance current continue through more than at least 2 hours, user can after completing the switch operation of transfer load handling failure circuit; The not powered network planning mould of defencive function of digital arc extinction cabinet with the impact of operational mode.
Accompanying drawing explanation
Fig. 1 is the one digital arc extinction cabinet overall structure block diagram that the utility model proposes;
Fig. 2 is the digital arc extinction cabinet cut-away view of one that the utility model proposes.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
See Fig. 1 and Fig. 2, wherein Fig. 1 is the one digital arc extinction cabinet overall structure block diagram that the utility model proposes; Fig. 2 is the digital arc extinction cabinet cut-away view of one that the utility model proposes.
As depicted in figs. 1 and 2, a kind of digital arc extinction cabinet, comprise: housing 1, be arranged on the arc-suppressing controller 2 of enclosure interior, checkout gear 3 and control protective unit 4, described checkout gear 3 comprises and is arranged on voltage transformer 31 summation current transformer 32, described control protective unit 4 comprises an electromagnetic lock 41, disconnecting link electromagnetic lock 42, isolation switch 43, high breaking high-tension fuse 44, overvoltage protection device 45, high-voltage and current-limitation fuse 46 and vacuum contactor 47, the output of described voltage transformer 31 summation current transformer 32 connects arc-suppressing controller 2, the output connection control protective device 4 of described arc-suppressing controller 2, described arc-suppressing controller 2 arranges RS495 interface 5, described extinguishing arc controls 2 and arranges a harmonic elimination and secondary microcomputer harmonic elimination device 6.
Further, described housing 1 also comprises impact protector mechanism 7.
Further, described housing 1 arranges observation window 8.
Further, described housing 1 arranged outside display unit 9, the output of described arc-suppressing controller 2 is connected with described display unit 9 by display driver circuit.
Further, described display unit 9 comprises on off state display control device, comprises charged display, and opening and closing state indicates, and earthed switch indicates, and energy storage indicates, and handcart position instruction, voice anti-fault prompting, humiture numerical value shows.
In the utility model embodiment, when single-phase arc grounding fault occurs system, digital arc extinction cabinet can drop into the vacuum contactor of fault phase in 30ms, and faulted phase voltage drops to zero, and the electric arc of fault point extinguishes thereupon, and digital arc extinction cabinet sends actuating signal.
As for overhead transmission line, can set and automatically disconnect through 4-5s vacuum contactor, as being transient fault, then System recover normally runs, and as being permanent fault, vacuum contactor again drops into and no longer disconnects, and plays the effect of permanent deboost.
When after the excision of system failure circuit, need manually to control to make digital arc extinction cabinet automatically recover normal condition by reset button or a distant place.
Due to after the digital arc extinction cabinet action that a variety of causes causes by digital arc extinction cabinet two-phase grounding fault time, earth point in digital arc extinction cabinet excises fast by high-voltage and current-limitation fuse in 1-2ms, prevent the consequence of line to line fault, can not normally run by influential system.
Voltage transformer in digital arc extinction cabinet can provide secondary voltage signal to other indicating instrument and protective relaying device etc., and digital arc extinction cabinet is configured with RS485 interface, can realize data remote by bus.Digital arc extinction cabinet can record time, device action state and the related accidents parameter of 20 event of failure generations.Digital arc extinction cabinet also arranges a harmonic elimination and secondary microcomputer harmonic elimination device, to limit resonance overvoltage.
Digital arc extinction cabinet can install the custom-designed line selection device for low current based on maximal increment method principle of our company additional, realize automatic route selection function, change maximum principle with only having faulty line zero-sequence current before and after arc extinction and carry out failure judgement circuit, the deficiency that conventional line selection apparatus exists can be overcome, route selection accuracy rate during arc grounding is improved greatly.
Above the utility model is described in detail, but the utility model is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from the utility model aim.Do not depart from design of the present utility model and scope can make many other and change and remodeling.Should be appreciated that the utility model is not limited to specific execution mode, scope of the present utility model is defined by the following claims.
Claims (5)
1. a digital arc extinction cabinet, it is characterized in that, comprise: housing (1), be arranged on the arc-suppressing controller (2) of enclosure interior, checkout gear (3) and control protective unit (4), described checkout gear (3) comprises and is arranged on voltage transformer (31) summation current transformer (32), described control protective unit (4) comprises an electromagnetic lock (41), disconnecting link electromagnetic lock (42), isolation switch (43), high breaking high-tension fuse (44), overvoltage protection device (45), high-voltage and current-limitation fuse (46) and vacuum contactor (47), the output of described voltage transformer (31) summation current transformer (32) connects arc-suppressing controller (2), the output connection control protective device (4) of described arc-suppressing controller (2), described arc-suppressing controller (2) is arranged RS495 interface (5), described arc-suppressing controller (2) arranges a harmonic elimination and secondary microcomputer harmonic elimination device (6).
2. the digital arc extinction cabinet of one according to claim 1, is characterized in that: described housing (1) also comprises impact protector mechanism (7).
3. the digital arc extinction cabinet of one according to claim 1, is characterized in that: described housing (1) is arranged observation window (8).
4. the digital arc extinction cabinet of one according to claim 1, is characterized in that: described housing (1) arranged outside display unit (9), and the output of described arc-suppressing controller (2) is connected with described display unit (9) by display driver circuit.
5. the digital arc extinction cabinet of one according to claim 4, is characterized in that: described display unit (9) comprises on off state display control device, comprises charged display, opening and closing state indicates, and earthed switch indicates, and energy storage indicates, handcart position instruction, voice anti-fault prompting, humiture numerical value shows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520389337.6U CN204794071U (en) | 2015-08-01 | 2015-08-01 | Digital arc extinction cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520389337.6U CN204794071U (en) | 2015-08-01 | 2015-08-01 | Digital arc extinction cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794071U true CN204794071U (en) | 2015-11-18 |
Family
ID=54534054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520389337.6U Expired - Fee Related CN204794071U (en) | 2015-08-01 | 2015-08-01 | Digital arc extinction cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204794071U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786472A (en) * | 2015-11-24 | 2017-05-31 | 合肥亚飞电力设备有限公司 | A kind of digital arc extinction cabinet |
-
2015
- 2015-08-01 CN CN201520389337.6U patent/CN204794071U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786472A (en) * | 2015-11-24 | 2017-05-31 | 合肥亚飞电力设备有限公司 | A kind of digital arc extinction cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20170801 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |